The five landform regions that make up the United States are the West, Midwest, Northeast, Southwest and Southeast regions. The states that comprise these individual regions are grouped according to their locations on the continent, as well as the major physical features and climatic conditions that are common in these areas. Continue Reading.
In 1845, America tried buying huge parts of Mexican land that included present day California and New Mexico. When Mexico refused to part with its land, America tried using force. Mexico and America both maintained that the border was theirs. This led to the beginning of the Mexican America War that would last for two years (1846-48). America won the war decisively. Mexico had to give up California, New Mexico, Utah, Nevada and parts of Colorado, Wyoming and Arizona.
The US Congress approved the Declaration of War with Mexico on 13 May 1846, but many historians use 25 April 1846 as the starting date which is when Americans were first kille â¦ d during the conflict between the US Cavalry and the Mexican Army called the Thornton Affair.